CVE-2026-24883

In GnuPG before 2.5.17, a long signature packet length causes parse_signature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).

Published: 2026-01-27 Last update: 2026-02-06 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-24883 is rated Low Risk (27.6/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.45%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-24883

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.45% +0.44%
2 2026-01-28 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-24883

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 1.4 [email protected]
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2026-24883

OS Trackers for CVE-2026-24883

vendor priority summary link
debian unimportant CVE-2026-24883 unimportant priority: Debian including 1 source packages (gnupg2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-24883
redhat low — https://access.redhat.com/security/cve/CVE-2026-24883
suse high CVE-2026-24883 severity important: SUSE including 245 source package names (16.3-1.17:gpg2-2.5.5-160000.4.1, amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, …), 348 product×package rows across 66 product lines (Container suse/sles/16.0/toolbox, Image SLE-Micro, … (66 product lines)): Known Affected 231, Known Not Affected 61, Fixed 52, First Fixed 4. https://www.suse.com/security/cve/CVE-2026-24883/
ubuntu medium CVE-2026-24883 medium priority: Ubuntu including 1 source packages (gnupg2), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): not-affected 6, released 1. https://ubuntu.com/security/CVE-2026-24883

Affected software / configurations for CVE-2026-24883

Vendor Product Version Raw CPE
gnupg gnupg >= 2.5.13, < 2.5.17 cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*
gpg4win gpg4win >= 5.0.0, < 5.0.1 cpe:2.3:a:gpg4win:gpg4win:*:*:*:*:*:*:*:*

References for CVE-2026-24883

URL Tags
https://dev.gnupg.org/T8049 Patch Product
https://www.openwall.com/lists/oss-security/2026/01/27/8 Mailing List Third Party Advisory
cvelogic Threat Intelligence